Variables starting with `o' in 321/irix

• old_mouse_x 321/irix/glw_imp.c:131
• old_mouse_y 321/irix/glw_imp.c:131
• old_windowed_mouse 321/irix/glw_imp.c:132
• op 321/irix/qgl_irix.c:35
• opcode 321/irix/qgl_irix.c:196
• order 321/irix/qgl_irix.c:197